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https://www.readbyqxmd.com/read/28098866/in-vitro-long-term-treatment-with-mapk-inhibitors-induces-melanoma-cells-with-resistance-plasticity-to-inhibitors-while-retaining-sensitivity-to-cd8-t-cells
#1
Florencia Paula Madorsky Rowdo, Antonela Barón, Erika María von Euw, José Mordoh
The development of BRAF V600 and MEK inhibitors constitutes a breakthrough in the treatment of patients with BRAF-mutated metastatic melanoma. However, although there is an increase in overall survival, these patients generally confront recurrence, and several resistance mechanisms have already been described. In the present study we describe a different resistance mechanism. After several weeks of long‑term in vitro treatment of two different V600E BRAF‑mutated melanoma cell lines with MARK inhibitors, PLX4032 and/or GDC-0973, the majority of the cells died whereas some remained viable and quiescent (SUR)...
January 13, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28097856/-transition-experience-of-patients-with-neuromuscular-disease
#2
Valeria Greif, Florencia Ugo, M Fernanda de Castro Pérez, Julieta Mozzoni, Verónica Aguerre, Milagros Saldías, M Soledad Monges
Neuromuscular diseases are mostly genetic disorders, with chronic and progressive course. Affected people are at high risk of developing physical and emotional disabilities. In the last decades, the advance in technology and science has increased chronic pediatric patients survival rate, thus requiring an ongoing assistance in adult hospitals, making the transition a necessity and a challenge. This article reports the clinical practice designed between Hospital Garrahan and Hospital Ramos Mejía for the transition of 27 adolescents during 2015, setting achievements, findings and challenges resulting from this experience...
1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28097836/validation-of-the-argentine-spanish-version-of-transition-readiness-assessment-questionnaire-for-adolescents-with-chronic-conditions
#3
Florencia González, Mariana Roizen, María de Las Mercedes Rodríguez Celin, Carmen De Cunto, Alfredo Eymann, Roberto Mato, Patricia García Arrigoni, Raquel Staciuk, Florencia Ugo, Virginia Fano
INTRODUCTION: The transition of adolescents with chronic conditions to adult follow-up care is an increasingly complex process. Patients need to acquire knowledge and skills that ensure continuity of their care. The goal of this study was to validate the Argentinian Spanish version of the Transition Readiness Assessment Questionnaire (TRAQ) 5.0 tool in adolescents and young adults with chronic conditions. POPULATION AND METHODS: Descriptive, crosssectional, quantitative study...
1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28093789/chronic-infection-of-the-prostate-by-chlamydia-muridarum-is-accompanied-by-local-inflammation-and-pelvic-pain-development
#4
Leonardo R Sanchez, Maria L Breser, Gloria J Godoy, Florencia C Salazar, Juan P Mackern-Oberti, Cecilia Cuffini, Ruben D Motrich, Virginia E Rivero
BACKGROUND: Chlamydia trachomatis urogenital infections are the leading cause of sexually transmitted bacterial infections. Although the prevalence of chlamydial infection is similar in men and women, current research is mainly focused on women, neglecting the study of male genital tract infections. We, therefore, investigated Chlamydia infection in the rodent male genital tract. MATERIALS AND METHODS: Male NOD and C57BL/6 mice were inoculated in the meatus urethra with C...
January 17, 2017: Prostate
https://www.readbyqxmd.com/read/28092246/-neonatal-hearing-screening-and-early-intervention-a-screening-program-to-evaluate-all-infants-to-identify-the-hearing-impaired
#5
Beatriz González-Jiménez, Efrén Delgado-Mendoza, Rafael Rojano-González, Florencia Valdez-Izaguirre, Pedro Gutiérrez-Aguilar, Félix Guillermo Márquez-Celedonio, Mario González-Santes
BACKGROUND: Neonatal Hearing Screening and Early Intervention (NHSEI) is a screening program to evaluate all infants and identify those with hearing impairment. The objective of this work was to determine the factors associated with hearing loss in NHSEI program. METHODS: Analytical cross-sectional study was performed. 234 infants were included in the NHSEI program, hearing was evaluated with transitory evoked otoacoustic emissions (TEOE) at frequencies of 1.5 to 4...
January 2017: Revista Médica del Instituto Mexicano del Seguro Social
https://www.readbyqxmd.com/read/28088912/melatonin-as-a-therapeutic-resource-for-inflammatory-visual-diseases
#6
Marcos L Aranda, María Florencia González Fleitas, Hernán Dieguez, Agustina Iaquinandi, Pablo H Sande, Damián Dorfman, Ruth E Rosenstein
BACKGROUND: Uveitis and optic neuritis are prevalent ocular inflammatory diseases, and highly damaging ocular conditions. Both diseases are currently treated with corticosteroids, but they do not have adequate efficacy and are often associated with severe side effects. Thus, uveitis and optic neuritis remain a challenging field to ophthalmologists and a significant public health concern. OBJECTIVE: This review summarizes findings showing the benefits of a treatment with melatonin in experimental models of these inflammatory ocular diseases...
January 13, 2017: Current Neuropharmacology
https://www.readbyqxmd.com/read/28087397/elbow-locking-in-a-patient-with-a-congenital-radial-head-dislocation-case-report
#7
Hee-June Kim, Poong-Taek Kim, Hyun-Joo Lee, Maria Florencia Deslivia
Snapping elbow is a rare condition which has various possible causes such as impinged plica, annular ligament, or other extra-articular causes. We report a case of 15-year-old boy who had had snapping elbow and sudden onset flexion contracture of the elbow. Simple radiographs showed bilateral anterior dislocation of hypoplastic radial heads. Magnetic resonance images with the elbow extended as much as possible showed that the annular ligament hemmed the dislocated radial neck. By surgical incision of the annular ligament which checkreined the radial neck, the patients could regain full extension of the elbow...
January 10, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28087293/first-itraconazole-resistant-aspergillus-fumigatus-clinical-isolate-harbouring-a-g54e-substitution-in-cyp51ap-in-south-america
#8
Florencia Leonardelli, Laura Theill, María Elena Nardin, Daiana Macedo, Catiana Dudiuk, Emilce Mendez, Soledad Gamarra, Guillermo Garcia-Effron
BACKGROUND: A 27-year-old male rural worker was admitted with a fungal keratitis due to an injury involving plant detritus. MATERIALS AND METHODS: Specimens were collected for microscopy examination and culture. The isolate was identified by morphological and molecular criteria. Susceptibility testing was performed using CLSI methods. CYP51A gene was PCR amplified and sequenced. RESULTS: An Aspergillus fumigatus strain resistant to itraconazole (MIC>8μg/ml) was isolated...
January 10, 2017: Revista Iberoamericana de Micología
https://www.readbyqxmd.com/read/28073057/neonicotinoids-transference-from-the-field-to-the-hive-by-honey-bees-towards-a-pesticide-residues-biomonitor
#9
Niell Silvina, Jesús Florencia, Pérez Nicolás, Pérez Cecilia, Pareja Lucía, Silvana Abbate, Carrasco-Letelier Leonidas, Díaz Sebastián, Mendoza Yamandú, Cesio Verónica, Heinzen Horacio
The beehive as a quantitative monitor of pesticide residues applied over a soybean crop was studied through a semi field experiment of controlled exposure of honey bees to pesticides in macro tunnels. The distribution within exposed beehives of pesticides commonly used in soybean plantation, was assessed. Residue levels of insecticides in soybean leaves, honey bees, wax, honey and pollen were analyzed. The transference from pesticides present in the environment into the beehive was evidenced. The obtained results allow relating pesticide concentrations present in the environment with traces found in foraging bees...
January 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28069904/detection-and-activity-of-11-beta-hydroxylase-cyp11b1-in-the-bovine-ovary
#10
Ayelen N Amweg, Fernanda Mariel Rodriguez, Emilia Huber, Belkis E Marelli, Natalia Gareis, Eduardo M Belotti, Florencia Rey, Natalia Raquel Salvetti, Hugo H Ortega
Glucocorticoids (GCs) such as cortisol and corticosterone are important steroid hormones with different functions in intermediate metabolism, development, cell differentiation, immune response and reproduction. In response to physiological and immunological stress, adrenocorticotropic hormone (ACTH) acts on the adrenal gland by stimulating synthesis and secretion of GCs. However, there is increasing evidence that GCs may also be synthesized by extra-adrenal tissues. Here, we examined the gene and protein expression of the enzyme 11β-hydroxylase P450c11 (CYP11B1), involved in the conversion of 11-deoxycortisol to cortisol, in the different components of the bovine ovary, and determined the functionality of CYP11B1 in vitro...
January 9, 2017: Reproduction: the Official Journal of the Society for the Study of Fertility
https://www.readbyqxmd.com/read/28067420/cost-effectiveness-of-cytogenetic-evaluation-of-products-of-conception-by-chorionic-villous-sampling-in-recurrent-miscarriage
#11
Florencia Petracchi, Cecilia Paez, Laura Igarzabal
OBJECTIVE: To compare the cost-effectiveness of performing chorionic villous sampling (CVS) of products of conception (POC) in the evaluation of recurrent miscarriage versus standard evidence based work-up (EBW) of the couple. MATERIAL AND METHODS: A Decision-analytic model was performed in couples with a third miscarriage. Three strategies were considered: 1)the standard EBW of all the patients: comprising parental karyotype, uterine cavity assessment and antiphospholipid antibodies...
January 9, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28066863/assessing-equity-in-the-provision-of-primary-healthcare-centers-in-buenos-aires-province-argentina-a-stochastic-frontier-analysis
#12
Florencia Arnaudo, Fernando Lago, Valentina Viego
BACKGROUND: Unequal access to healthcare between individuals or populations does not imply the existence of inequities as it must be controlled for differences in need. This is usually done either via direct or indirect standardization methods. OBJECTIVE: We study the degree of equity in the availability of public primary healthcare centers between the 134 municipalities of the Buenos Aires province (Argentina) with a novel application of an existing statistical tool...
January 9, 2017: Applied Health Economics and Health Policy
https://www.readbyqxmd.com/read/28063038/surgical-denervation-in-the-imiquimod-induced-psoriasiform-mouse-model
#13
Armanda J Onderdijk, Ineke M Hekking-Weijma, Edwin F Florencia, Errol P Prens
Psoriasis is a chronic inflammatory skin disease with a prevalence of 2-3 %. It appears to result from a combination of genetic and environmental factors, but the precise pathogenesis is still unknown. Neurogenic inflammation is involved in psoriasis pathogenesis as well, but the role of neurogenic factors is currently unclear. Molecular studies often involve material obtained from patients. However, many questions and especially experimental manipulations are not suited for study in humans. Imiquimod application on mouse skin leads to immune cell infiltration, inflammation with intense redness, epidermal thickening, and scaling that jointly greatly resembles human psoriasis...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28062001/identification-of-a-surface-epitope-specific-of-virulent-strains-of-haemophilus-parasuis
#14
Florencia Correa-Fiz, Nuria Galofre-Mila, Mar Costa-Hurtado, Virginia Aragon
Haemophilus parasuis is a bacterium from the Pasteurellaceae family that comprises strains of different degree of virulence. Non-virulent strains are considered components of the upper respiratory tract microbiota, while virulent strains can invade systemic organs and cause fibrinous polyserositis (Glässer's disease). Genomic comparison of virulent and non-virulent strains led to the identification of a family of genes differentially associated to virulence, the virulence-associated trimeric autotransporters (vtaA)...
January 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28058556/surgical-treatment-of-malignant-pheochromocytoma-and-paraganglioma-retrospective-case-series
#15
Veljko Strajina, Benzon M Dy, David R Farley, Melanie L Richards, Travis J McKenzie, Keith C Bible, Florencia G Que, David M Nagorney, William F Young, Geoffrey B Thompson
INTRODUCTION: Pheochromocytoma and paraganglioma (PPGL) are rare neoplasms; about 10% are malignant. Literature regarding possible benefit from resection is extremely limited. METHODS: A 20 year review of all patients undergoing surgery for malignant PPGL at the Mayo Clinic Rochester Campus between 1994 and June 2014 was performed. RESULTS: We identified 34 patients undergoing surgery for malignant PPGL. Median follow up was 6 and 5 years survival was 90% (median 11 years)...
January 5, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28056451/disruption-of-the-hatching-dynamics-of-zooplankton-egg-banks-due-to-glyphosate-application
#16
María Florencia Gutierrez, Yamila Battauz, Belén Caisso
Hatching rhythms of eggs banks are important processes because they favor species co-existence and promote resilience of ecosystems after natural disturbances. Anthropogenic stressors can disrupt such natural hatching dynamics. This work examines the effects of concentrations ranging from 1 to 8 mg l(-1) of a commercial glyphosate-based formulation (Sulfosato Touchdown(®)) on the hatching dynamics of zooplankton dormant stages, present in the sediment of a natural lake. Sediment samples were collected from the surface sediment (<10 cm deep) of an isolated shallow lake free from pesticide pollution...
December 26, 2016: Chemosphere
https://www.readbyqxmd.com/read/28039090/effects-of-previous-physical-exercise-to-chronic-stress-on-long-term-aversive-memory-and-oxidative-stress-in-amygdala-and-hippocampus-of-rats
#17
Tiago Marcon Dos Santos, Janaína Kolling, Cassiana Siebert, Helena Biasibetti, Carolina Gessinger Bertó, Lucas Kich Grun, Carla Dalmaz, Florencia María Barbé-Tuana, Angela T S Wyse
Since stressful situations are considered risk factors for the development of depression and there are few studies evaluating prevention therapies for this disease, in the present study we evaluated the effect of previous physical exercise in animals subjected to chronic variable stress (CVS), an animal model of depression, on behavior tasks. We also investigated some parameters of oxidative stress and Na(+), K(+)-ATPase activity, immunocontent and gene expression of alpha subunits in amygdala and hippocampus of rats...
December 27, 2016: International Journal of Developmental Neuroscience
https://www.readbyqxmd.com/read/28025587/panel-conditioning-in-the-general-social-survey
#18
Andrew Halpern-Manners, John Robert Warren, Florencia Torche
Does participation in one wave of a survey have an effect on respondents' answers to questions in subsequent waves? In this article, we investigate the presence and magnitude of "panel conditioning" effects in one of the most frequently used data sets in the social sciences: the General Social Survey (GSS). Using longitudinal records from the 2006, 2008, and 2010 surveys, we find evidence that at least some GSS items suffer from this form of bias. To rule out the possibility of contamination due to selective attrition and/or unobserved heterogeneity, we strategically exploit a series of between-person comparisons across time-in-survey groups...
January 2017: Sociological Methods & Research
https://www.readbyqxmd.com/read/28024868/germline-mutations-in-palb2-brca1-and-rad51c-which-regulate-dna-recombination-repair-in-patients-with-gastric-cancer
#19
Ruta Sahasrabudhe, Paul Lott, Mabel Bohorquez, Ted Toal, Ana P Estrada, John J Suarez, Alejandro Brea-Fernández, José Cameselle-Teijeiro, Carla Pinto, Irma Ramos, Alejandra Mantilla, Rodrigo Prieto, Alejandro Corvalan, Enrique Norero, Carolina Alvarez, Teresa Tapia, Pilar Carvallo, Luz M Gonzalez, Alicia Cock-Rada, Angela Solano, Florencia Neffa, Adriana Della Valle, Chris Yau, Gabriela Soares, Alexander Borowsky, Nan Hu, Li-Ji He, Xiao-You Han, Philip R Taylor, Alisa M Goldstein, Javier Torres, Magdalena Echeverry, Clara Ruiz-Ponte, Manuel R Teixeira, Luis G Carvajal Carmona
Up to 10% of cases of gastric cancer are familial, but so far, only mutations in CDH1 have been associated with gastric cancer risk. To identify genetic variants that affect risk for gastric cancer, we collected blood samples from 28 patients with hereditary diffuse gastric cancer (HDGC) not associated with mutations in CDH1 and performed whole-exome sequence analysis. We then analyzed sequences of candidate genes in 333 independent HDGC and non-HDGC cases. We identified 11 cases with mutations in PALB2, BRCA1, or RAD51C genes, which regulate homologous DNA recombination...
December 23, 2016: Gastroenterology
https://www.readbyqxmd.com/read/28024520/molecular-identification-of-azospirillum-spp-limitations-of-16s-rrna-and-qualities-of-rpod-as-genetic-markers
#20
Guillermo A Maroniche, Julia E García, Florencia Salcedo, Cecilia M Creus
Since their discovery, plant-growth promoting rhizobacteria from the genus Azospirillum have been subjected to intensive research due to their biotechnological potential as crop inoculants. Phylogenetic analysis of Azospirillum spp. is carried out by 16S rRNA sequencing almost exclusively, but inconsistencies and low confidence often arise when working with close species. In this work, it was observed that these difficulties might be explained by a high number of rRNA operons with considerable inter-genic variability within Azospirillum genomes...
January 2017: Microbiological Research
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